Acquisitions - Unaudited Pro Forma Financial Information (Detail) (Vogel & Noot Holding AG, USD $) In Thousands, except Per Share data	3 Months Ended	9 Months Ended
Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Vogel & Noot Holding AG
Business Acquisition [Line Items]
Net sales	$ 1,148,008	$ 1,098,794	$ 2,718,839	$ 2,593,033
Net income	$ 78,966	$ 72,341	$ 160,591	$ 135,901
Earnings per share:
Basic net income per share	$ 1.13	$ 0.94	$ 2.29	$ 1.77
Diluted net income per share	$ 1.12	$ 0.93	$ 2.28	$ 1.76

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

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The pro forma diluted net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

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The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.

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The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.

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